1. Visible light communication sensors with adaptive hysteretic circuits for automotive applications
- Author
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Alin-Mihai Cailean, Mihai Dimian, Sorin Vlad, Adrian Done, and Petru Andrei
- Subjects
business.industry ,Computer science ,010401 analytical chemistry ,Automotive industry ,Visible light communication ,020206 networking & telecommunications ,02 engineering and technology ,Experimental validation ,Condensed Matter Physics ,01 natural sciences ,Noise (electronics) ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Hysteresis ,Microcontroller ,Schmitt trigger ,0202 electrical engineering, electronic engineering, information engineering ,Electronic engineering ,Electrical and Electronic Engineering ,business ,Electronic circuit - Abstract
As communication-based safety applications are developed for the next generation of vehicle active safety systems, this article focuses on the benefits of using adaptive hysteresis circuits toward the development of environmental-adaptive VLC sensors with significantly enhanced performances. Thus, analytical and numerical approaches to analyze hysteresis systems with noisy input are discussed and the benefits of adaptive hysteresis are presented. Furthermore, a linear relation between optimal hysteresis thresholds and noise strengths is determined. The experimental validation of the theoretical results is performed by using a Schmitt Trigger with threshold values adjusted by digital potentiometers controlled by an embedded microcontroller. Significant BER improvement is obtained by the hysteresis threshold adjustment.
- Published
- 2018
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